274 Mr. H, W. Bates on Cei-aiuhyciiloi 



2. Fcrihoeum cheninum. 



r. puhcscenti valde affinis ; differt corpore toto aterrinio, 

 politissimo, capite, articulo basali antennarum, et protho- 

 race subtus opacis griseo-tomentosis, stcrnis lateralitcr 

 sericeis. 



Long. 9 lin. (^ . 



Hah. — Pebas, Upper Amazons. 



3. Perihoeum iissonotum, n. sp. 



Angustatum, castaneo-rubrum, nitidutn, antennis pedi- 

 busque nigris; thorace elongate subcylindrico, lateribus 

 rotundatis, supra laevi ; elytris apice sinuato-truncatis, 

 bispinosis, spina suturali brevi ; pedibus brevibus, femori- 

 bus prope apicem clavatis, intermediis et posticis bi- 

 spinosis. 



Long. 5^ lin. $ . 



A species belonging to Nephalius (Lacord.), by the 

 form of the thorax and the bispinose femora, but to 

 Perihceum by its abruptly clavate femora, and especially 

 by its evidently close relationship to P. pubesccns. The 

 colour is reddish-chesnut, with the antennas and legs 

 pitchy-black, the derm shining, but trunk and limbs 

 clothed equally ^vith very long and straight hairs. The 

 head is strongly punctured, and naked ; the thorax is 

 elongate, rounded, and quite unarmed on the sides, 

 polished on the disc, and with a very strong bi-arcuate 

 transverse furrow near the hind margin ; the sides are 

 strongly punctured in patches, and the underside is 

 evenly punctured. Scutellum naked. The elytra are 

 not much wider than the thorax, and relatively not very 

 elongate ; the surface is coarsely punctured, except 

 near the apex; the extreme tip, and the spines, are 

 black. * 



Hab. — River Tapajos. 



* Other species exist which supply still further couneetiug links between 

 Perihoeum and Nephalius, as detiued by Lacordtiire ; among them is — 

 Nephalius JragiJis, u. sp. 



Elongatus, snbdeprcssns, nitidus, pilis sparsis erectis hirsutus, rufo- 

 testaceus, autennis, elytris, femoribus basi, tibiis et tarsis pallidioribus. 

 Caput plagiatim puuetatum. Thorax elongatus, lateribus niedi i paulo 

 rotundato-dilatatis, supra anticc et postice constrictus et transversim 

 sulcatulus, supra disco omniuo hi'vi. Elytra postice attonuata, apice 

 truucata et bispiuosa, spina sulurali brevi, ambabus nigris; supra Levia, 

 versus basin solum sparse punctata. Femora distiucte clavata, apice 

 bispinosa, spina inteiuori lougiori. 



Long. 5i lin. 



Hob. — ^liio Janeiro (E coll. Dom. Ecv. Ilamlet Clark) . 



